package lab1;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;

/**
 * @author tiger
 * @date 2021年3月8日-下午12:39:18
 */
public class Configuration {
    private Properties props = new Properties();

    /**
     * 读取属性配置文件
     *
     * @param confFile
     */
    public void fromFile(File confFile) {
        try (FileInputStream in = new FileInputStream(confFile);) {
            props.load(new InputStreamReader(in, StandardCharsets.UTF_8));
        } catch (IOException e) {
            throw new ValueParseException("配置文件解析错误");
        }
    }

    /**
     * 获取键值
     *
     * @param key
     * @return value
     */
    public String getProp(String key) {
        return props.getProperty(key);
    }

    /**
     * 获取布尔类型键值
     *
     * @param key
     * @return value
     */
    public boolean getBoolean(String key) {
        String value = props.getProperty(key);
        if ("true".equalsIgnoreCase(value)) {
            return true;
        }
        if ("false".equalsIgnoreCase(value)) {
            return false;
        }
        throw new ValueParseException("键值不存在");
    }


    public Boolean getBooleanWithDefault(String key, Boolean defaultValue) {
        String value = props.getProperty(key);
        if ("true".equalsIgnoreCase(value)) {
            return true;
        }
        if ("false".equalsIgnoreCase(value)) {
            return false;
        }
        return defaultValue;
    }

    public Integer getInt(String key, int defaultValue) {
        String value = props.getProperty(key);
        if(value==null)  return defaultValue;
        return Integer.valueOf(value);
    }

    public Date getDate(String key, Date defaultValue) throws ParseException {
        String value = props.getProperty(key);
        if(value==null) return defaultValue;
        SimpleDateFormat df = new SimpleDateFormat("yyyy.MM.dd");
        return df.parse(value);
    }
}